<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
	<title>数字对象</title>
	<script type="text/javascript">

		// alert(Math.abs(-4567));

		// document.write(Math.round(123.378));

		// document.write(Math.floor(123.678));
		// document.write(Math.ceil(123.178));

		// document.write(Math.round(Math.random()*(33-29))+29);


	



	</script>
</head>
<body>
	
</body>
</html>